2015
Universal dispersion model for characterization of optical thin films over wide spectral range: Application to hafnia
FRANTA, Daniel; David NEČAS a Ivan OHLÍDALZákladní údaje
Originální název
Universal dispersion model for characterization of optical thin films over wide spectral range: Application to hafnia
Autoři
FRANTA, Daniel; David NEČAS a Ivan OHLÍDAL
Vydání
Applied Optics, 2015, 1559-128X
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10302 Condensed matter physics
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 1.598
Označené pro přenos do RIV
Ano
Kód RIV
RIV/00216224:14310/15:00080435
Organizační jednotka
Přírodovědecká fakulta
UT WoS
EID Scopus
Klíčová slova anglicky
Thin films; Dispersion; Ellipsometry; Spectrophotometry; Far IR; Vacuum UV
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 30. 3. 2016 12:42, Ing. Andrea Mikešková
Anotace
V originále
A dispersion model capable of expressing the dielectric response of a broad class of optical materials in a wide spectral range from far IR to vacuum UV is described in detail. The application of this Universal Dispersion Model to a specific material is demonstrated using the ellipsometric and spectrophotometric characterization of a hafnia film prepared by vacuum evaporation on silicon substrate. The characterization utilizes simultaneous processing of data from multiple techniques and instruments covering the wide spectral range and includes the characterization of roughness, non-uniformity, transition layer and native oxide layer on the back of the substrate. It is shown how the combination of measurements in light reflected from both side of the sample and transmitted light allows the separation of weak absorption in film and substrate. This approach is particularly useful in the IR region where the absorption structures in films and substrates often overlap and a prior measurement of bare substrate may be otherwise necessary for precise separation. Individual phenomena that contribute to the dielectric response, i.e. interband electronic transitions, electronic excitations involving the localized states and phonon absorption, are discussed in detail. A quantitative analysis of absorption on localized states, permitting the separation of transitions between localized states from transitions between localized and extended states, is utilized to obtain estimates of density of localized states and film stoichiometry.
Návaznosti
| ED1.1.00/02.0068, projekt VaV |
| ||
| ED2.1.00/03.0086, projekt VaV |
| ||
| LO1411, projekt VaV |
| ||
| TA02010784, projekt VaV |
|